Animal-shears.



E. S. BARTLETT, SII.

ANIMAL SHEARS.

APPLICATION FILED MAII.6.I9I1.

l ,30 1 ,089, Patented Apr. 22, 1919.

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A TTUH/V E Y S E. S. BARTLETT, Sn.

' ANIMAL SHE/ARS.

` APPLICATION FILED MAR. 6| 1917.

1,301,089. Patented Apr. 22,1919.

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WIT/VESSES A TTOH/VEVS A, i Be it known that rarnnr orrien EDWIN STANLEY BARTLETT, SR., F BUTTE, MONTANA.

ANIMAL-SHEARS.

To all whom it may concern.'

l, EDWIN STANLEY f BARRETT, Sr., a citizen of the United States,

and a resident vof Butte, in the county of Silverbow and State of Montana, have invented an Improvement in Animal-Shears, of which the following is a specification.

My invention is an improvement in shears, and has for its object to provide new and improved mechanism for connecting the shears with the operating mechanism, and for connecting the operating fork with the blade.

In the drawings:

Figure 1 is a top plan view of the improved shears with thecover removed.

2 is a longitudinal vertical section.

Fig. f

VFig. 3 is an end view of the housing the operating shaft.

Fig. 4 is an `enlarged longitudinal section through the said housing showing the modified form of bearing.

Fig. 5 is a top plan view of the operating fork. i v.

Fig. 6 is an end view of the same. Fig. 7 Vis atop-'plan view of the movable cutting blade.

Fig. 8 is a longitudinal vertical section on the line 8-8 of Fig. 1.

rlhe present embodiment of the invention is an improvement over my prior Patent No. 1,299,379, granted December 19, 1916, and the device comprises a casing 1 having a removable cover 2, held in place by means of screws 3, and'provided at its outer end with a hood or dome portion 4 in which is housed the tensioning device indicated generally at 5, and forming the subject-matter of the aforesaid patent.

Within this casing is mounted a housing 6 for the drive shaft 7, the said shaft being journaled in the housing, as shown, and being provided at its inner end with a crank disk 8 having a crank pin 9, which is connected with the inner forked end 10 of the vibrator 11, the crank pin being inserted between the arms of the fork and moving between the same when the shaft is rotated, to operate the vibrator. The vibrator is fulcrumed on a pivot post 17, and when caused to vibrate will operate the movable cutter 18 carried thereby, and which coperates with the fixed cutter 19 connected to the casing 1, as indicated at 20. rlhe tensioning device bears against the vibrator between the Specification of Letters Patent.

Application med March e, 1917. vserial 110-152.631.

cutter 18 and the pivotv post 17, to hold the movable cutter in rm contact with the fixed cutter. The end of the vibrator adjacent to the lcutter 18 is provided with two forks 21, and the arms of these forks engage the movable cutter. The said arms extend outwardly and downwardly, as shown in Figs. 2 and 6, and each armis provided on its under side and at its outer end with a V- shaped recess 22. The bottoms of the recesses are extended, as shown at 22, the extensions having parallel side walls, as shown, and these recesses engage beveledsurfaces or bearings 24 on the yteeth of the movable cutter 18,. lt will vbe noticed that the said movable critter has four teeth, so that each tooth is engaged by one of the arms of the fork. The extensions 23 provide a clearance at the bottom of each notch or recess 22, so that as the fork arms vwear the side of the notches are left free to adjust themselves to the knife bearings.

direction. The central line of the bearing is iush with th'e top of the finger, but the sides of the bearing have shoulders at their ends, and the cutter is held in place by the engagement of the elements 21 at the points 22 with the shoulders.

The end of the casing 1 remote from the notches is internally enlarged, to receive an annular rib 25 on the housing 6, and a bushing 26 fits within this enlarged portion, the inner edge of the bushing bearing against the rib. The outer end of the bushing is enlarged as indicated at 27 to form one of the members of a joint, the other member 28 'of the joint being connected `to the housing 29 of the operating shaft 30. The operating shaft aiid the driving shaft have interengaging gears 31 for constraining the driving shaft to rotate with the transmission shaft. 100

The bushing 26 is rotatable within the 'casing 1 and upon the housing 6, and a roller bearing indicated generally at 32 is arranged between the bushing and the housing. The

enlargements 27 and 28 have ears 33, 33a, 105

upon the ear 34. The ears 33 and 34 carry 110 bushing's, each of which` has a marginal external rib 37 at its inner end, andtherears 33a and 34a carry theI pivotpins 35.

Each of these pins, as shown more particularly in Fig. 3, is headed at its innerend and is provided intermediate its ends with ,y a .radial rib 89 which fits Within a similarly shaped recess in the outer ends of the ears 33a and 34a. Thus a rhinged connection is provided between the enlargements 27 and 28, anda yrotatable connection between the bushing 26andthe casing l, thus providing a-universal joint connectionbetween the- "housing v29 and the casing 1.

'pivotal'y connection between the housing 29 -andthebushing 26 becomes worn, it may be ,""renewed, byf'providing new pivot pins 35 and new'bushings 36. The pivot pins may be renewed by cutting away the heads 38,

' the,4 collar bears.

and the two" parts of the vjoint'may be sepa-y rated when the/ gears are not in mesh. v

i If `desired, l' the roller bearing shown in "Figi 2 may be replaced by a double ball bearing, asshown inFig. 4. In'thisconstruc- 'tion 'the'houfsing 6a isl arranged within the f'casing la', and the bu`shing`26a isV arranged between' the housing 6a and the casing 1a.- This" casing has at` each end an annular" groove'LO, which cooperates with grooves 41 i and-42 at a radial rib 4:3 on the outer end of the housing G, 'and on a collar .LL'which encircles the housing 6a. An annular rib 45 isl formed on the housing, against which The bushing in Fig. 2 is When the threaded into thelcasing l at its inner end,

and the bushing 6JL may be similarly connected with the casing la.

I claim ,lu In shears, the combination with the iXed cutter and the movable cutter, of a vibrator having arms registering with the teeth of the movable cutter, eacharm havingav-V-shapedrecess and each tooth having a bearing for the arm consisting of oppositely arranged beveled surfacesflmeeting at 4the top ofthe tooth, shouldersbeingformed brator having-arms registering with the 'teeth ofthe movable cutter, each arm hav- 'ing a V-sha'ped r'ecessiand" eaclitooth having a bearing for the arm consisting of oppositely arranged beveled? surfaces meeting at the-top of the tooth, shoulders I being formed at-the ends off the beveledsurfac'es for Vengagement by the arms to limitlthe longitudinal-movement ofthe' arms with respect to the. cutter.

' EDWIN STANLEY BARTLETT, su.

Witnesses to signature: T. J. DAVIS, LILLIAN I-IART.

Gsipies'o.' this patent v'maybe obtained for ve centseach1 byaddressing` the Commissioner otfPatents,

Washington, D. C. 

